condition mean min max ZT0-3 53.0243 53.0243 53.0243 ZT4-7 50.6874 50.6874 50.6874 ZT8-11 30.5578 30.5578 30.5578 ZT12-15 27.41 27.41 27.41 ZT16-19 39.574200000000005 39.574200000000005 39.574200000000005 ZT20-23 55.69955 55.69955 55.69955